Stump-chopping machine



I'. LYNCH AND C. McGUIRE.

STUMP CHOPPING MACHINE.

APPLICATION FILED MAR. 7. |921.

Patlltedsept. 20, 1921.

2 SHEETS-snm l.

. or split, the stump Vrected. Y

vAnother object of the invention 1s to pro- UNITED v's'rA-Tesf PATENT oFFIcE. f

JOHN LYNGHI AND CHARLES MCGUIRE, 'or SEATTLE, WASHINGTON.

ysrUiirr-CHO,PPINer MACHINE.

Specification of Letters Patent. l Patented Sept, 20, 19221,

Application filed arch 7, 1921. n' Serial No. 450,224.

To @ZZ 'whom z' may concern Be it known that we, JOHN LYNCH. CHARLES MCGUIRE, citizens of the United States, and residents of the city lof Seattle, county of King, State of Washington, have invented certain new and useful Improvements in Stump-@hopping Machines, of

which the following is a specification.

.vention is to provide ra portable, stump chopping machine which operates after the Afashion of a pile driver, andV vwherein the chopping, or cutting, blade isliXedat the lowerV end of a .heavy reciprocally mounted shaft that may be mechanically raisedV and then dropped, so that the .cutter will cut,

vide a device of the above described character, comprising means wherebythe cutter carrying .shaft mayL be .moved rotatably within its support while inv action,'so. as to adjust or, regulate the direction ofthe blade to accomplish the best results, and other means. whereby thechopping shaft may be inclined to .different positions to best reach; the'object against which it may be directed.

It is also an Iobject ofthe invention to provide a machinel of the above character that maybe used for other work outside of destroying stumps, such as for hole drilling purposes,.post driving, chopping, etc.'

In accomplishingthese and other objects of the invention, we have provided Vthe. improved details of construction, the'preferred forms of which are ,illustrated in the r ac-A *empanying drawings, wherein'- Figure .'l'isfa side elevationof a stumpj chopping machine embodying the' present invention. Fig. 2 is a plan view of the same.

Fig. 3 is .a front elevation of' the l mal i tothe sleeve beneath the ring 21-which prevents longitudinal movement of the sleeve chine. e Fig. 4 is an enlarged sectional, detail View of the choppingshaft guide sleeve, with the.`

against whichk it is di-V f' at opposite sidesthereof, and, at their upper ends are fixedby bolts or otherwise,

Fig. 5 is an enlarged plan view of the shaft vguide and its rotatingmeans.

Fig. 6 isY anenlargedlside Vview' of ,the shaft vadjusting mechanism. i

Fig. 7 is a detail view of the locking mechanism.

Referring more in detail tothe several views of the drawings, wherein like reference numerals designate the same or like partsv 1 and 2 designateparallel runners, connected at their rearward ends by a cross beam 3 and at their forward ends lby av cross beam 5, forming a portablebase upon:l

which is erected a. derrick structure, comprlsing a pair of substantially upright beams 6 and 7 which are erected at the front end of the base vwith theiru'pper ends drawn l together'` andleaned forwardlythereof, as

shownbest in Figs. 1 and 2, and which are supported in thisV manner by brace or tie beamsfS and 9 which are liz/red,` at their lower ends, to the rearward end of the base respectively to the upper ends of thebeams 6 and 7. Vertical vposts 10 and 11 are mounted, 1n spaced apart relation, upon the" cross beam 5 and at their upper ends are vfixed Vto theY beams 8` and 9; these latter posts servingas a means of support for the chopping shaft control mechanism presently described.

Y Adjacent the rear of the base frame are also cross beams- 12 and 13, Vupon which an -en-vv gine as indicated atl 14,V is' supported yand whereby a drum 15, on which a hoisting cable'l is wound, may be actuated.

horizontally'from `opposite sides of a ring member 21. A sleeve 22 is rotatably con-V tained lwithinthe ring 21 and is supported therein -by `means of a ring gear 23 that fits dicated at 25. A flanged ring 26 is secured but does not-prevent rotation thereof.

within the ring 21 and which is secured to the sleeve by means of rivets'or bolts as inbe of considerable length and weight, and is equipped at its lower end with a cutter blade 28 for engaging and chopping a stump against which it may be directed by reciprocation of the shaft' within the guide sleeve. A bracket 29 is fixed to the lower end of,

the shaft, and to this is attached the Aend of the cable 16 which, from the drum, extends s over asheave wheel secured on across beam 31on the beams 8 and 9jadjacent the,

bearings 17 and 18, and then extends downwardly tothe bracket 29 so that ,the pull is substantially inv the direction ofthe shaft nomatter to ywhat position it is directed. The driving mechanism of the drum would be :such thatthe-shaft couldbe raised and then dropped so that its weight would serve to` drivethe cutter yblade into4 the object against whichit was directed.

Within the upper and;lower ends vof thel sleeve 22, we have secured collars 34 and 35 and, within.,1 these hav .provided guide grooves 36k wherein. gui ebars 37 that are secured ,p longitudinally of thel shaft, are adaptedto slide toprevent it rotating `within the sleeve.I

To changel the` u direction of the Y cutter l blade, we have, provided for rotating the sleeve,` whichincidentally causes like movementof theshaftand blade. vThis israecomplished by means of av gear wheel 40, that is fixed on vthe inner end of a short shaft 41,1.contained co-axially within they trunnion 2.0 of the ringf21," and meshes; withthe ringA gear` 23. i A sprocket wheel 43 is fixed on the outer end ofthe shaft 41 and over this is extended-a sprocket chain belt 44which also operates over a-sprocke't wheel 45y on a.

shaft'46 rotatably mounted in the vlower end of-the post 11. The latter shaft may be revolved by means of a crank 47 to cause rotationof the gear 40 anda consequent rotation of the's'leeve 22 within the supported ring-21. A wheel 48 provided with periph` eralnotches 49 is also fixed on the shaft 46 and afdog 50 is fixedon thev post 11 tobe vdropped into these notches to lock thesamc at any adjusted position.V

To swing theshaft todifferent positions in theverticalplane, we have provided the following mechanism: y

Supported revolubly in bearings 55 secured on cross bars 56 and 57 extended bev tween thefpostsrl and 11 and lbeams and 7 respectively are .threaded shafts58 and59. Thesev areparallel and arefdisposed atopposite sides, and adjacent the lower. end of the sleeve22, and at their rearwardends arefequipped with sprocket wheels 60.y and 61,1whichlie inthe same plane of other sprocketjwheels v62, and' 63mounted on crossk bars-.64v and' 65 extended. between the posts. 10 and llfrespectively. adjacent `to the;cross osts `10` bar 56 and the lower endsfof the and. 11.` A spmcketchan exten. sieben@ these wheels so that rotation of the wheel 63 by means of a crank 67 thereon will cause. rotation of the shafts 58r and 59 in a like direction.

Threaded 'on the shafts 58 and-59 at opposite sides ofthe chopping shaft sleeve 22, are blocks69 and 70 into which are pivotally extended the trunnions 71 and 72 of a ring 73 ythat is slidably mounted, about; the sleeve 22. v

This construction provides that rotation of the shafts 58 and 59 will cause similar` shifting ofthe blocks 69 and 70 therealong andthis will cause the lower end of the sleevetob'e swung inwardly or outwardly to adjust thedirection of operation o f the chopping shaft accordingly. i

In operation, the base is IInovedup to a stump as shownin Fig, 1, the choppingv shaft .isthen raised and is inclined,by operation of the crank 67, tosuch position that it Vwill be directed against the., stump. The engineV is then started to cause the raising and dropping of theV pile=driver, and, the operator by manipulating the cranks 47and 67 can adjustthe-chopper to differentposil tions desired., Y a Y i .Having thus` described our invention, what weclaim as new thereinand desirev t0 secureby `LettersPatent, is;

1. A machineof the` character described, Y.

comprising a frame, a `chopping shaft guide y tion in said guide, means for adjusting the guide to change the ydirectionof the.- chopping shaft, meansrfor rotating the shaft within the guide andmeans for operating thelshaft. v i.

2. Av machine of thecharacter. described, comprising a frame structure, a chopping shaft guide sleeve supported pivotally by saidk frameto swing ina verticalplane, a chopping shaft. mounted for. reciprocation in said sleeve andA slidably; keyedl thereto and having a chopping blade at its lower end, means for effecting rotation` of the sleeve, means for; effecting adjustment of the tsleeve about its supporting means tocontrol. the direction of operation ofthechopping shaft and meansv for operating the shaft.

3., A machine of theclass described com* prising a basev havingl a frame structure erectedthereon to'v extend forwardly, of the base, a ring member. supported'pivotally at the upper end ofsaidstructure, a vchopping shaft, ,guide sleeve supported :from its; upper end for rotation within said ring, a.` chop ping shaft slidably keyed/'within saidsleeve, a` choppingV blade fixed. at ythe lower. end of said shaft, mechanism operable to effect rotative movement of the sleeve withinthe supportingy ring to adjust thev direction.: ofl

. to @hnge the.' directiva. Of Operatea ofthe(- Y, 4. In a machine of the character described,

a base, a frame s tructure erected upon the base to extend forwardly thereof, a ring member supported by trunnions at its opposite sides, at the upper end of the frame to swing about a horizontal axis transversely of the base, a guide sleeve suspended rotatably from its upper end within said ring,

Y a ring gear fixed about the sleeve, a shaft extended through a trunnion of said ring having a gear fixed on the inner end thereof f in mesh with said ring gear, and a sprocket wheel at theouter end ofsaid shaft, a chopper shaft slidably keyed within said sleeve, a cutter blade at the inner end of the chopper shaft, means for raising and dropping the chopper shaft, meansfor swinging the sleeve to effect an adjustment in the direction of operation of the shaft, a crank shaft fixed in the frame, a sprocket wheel on said' latter shaft, a chain belt extended about 'the lformer and last mentioned sprocket wheels whereby rotation of the crank shaft Vwill cause rotation of the sleeve for the purpose set forth.

5. Ina machine of the character described, a base, a .frame structure erected upon the base to extend forwardly thereof a ring member supported by trunnions at its opposite sides, at the upper end of the frame to swing` about a'horizontal axis transversely of the base, a guide'sleeve suspended rotatably from its upper end within said ring, a chopper shaft slidably keyed within said sleeve, a cutter blade at the inner end of the chopper shaft, means for raising and dropping the chopper shaft, a collar slidable on the lower end of said sleeve having laterally extending trunnions thereon, threaded shafts extended along opposite sides of said sleeve, yblocks mounted on said shafts and having said trunnions mounted therein, sprocket wheels on said shafts,- a crank shaft fixed in the lower part of the frame, aY

sprocket wheel on said shaft and a chain belt extended over said sprocket wheels Vwhereby rotation of the crank shaft effects adjustment of the sleeve for the purpose set forth.

'Signed at Seattle, Washington, this 1st day of March, 1921.

JoHN LYNCH. CHARLES MCGIHRE. 

